| Author | Titles | | 1.
| O'Flaherty, Liam | 1 | | 2.
| O'Flanagan, Patrick, 1946- | 1 | | 3.
| Ofrat, Gideaon | 2 | | 4.
| Ogando, Alice, 1900-1981 | 13 | | 5.
| Ogarev, Leonid | 1 | | 6.
| Ogawa, Camille | 3 | | 7.
| Ogawa , Isshin, 1860-1930 | 0 | | 8.
| Author is: Ogawa, Kasumasa, 1860-1930 | 1 | | 9.
| Ogawa, Kasumasa, 1860-1930 | 1 | | 10.
| Ogawa, Kikuko | 1 | | 11.
| Ogawa, Masataka | 1 |
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